package com.king.first.app.process;

import com.king.first.bean.WaterSensor;
import com.king.first.utils.ContentUtils;
import org.apache.flink.api.common.eventtime.SerializableTimestampAssigner;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.KeyedProcessFunction;
import org.apache.flink.util.Collector;

public class Flink_KeyedProcessFunction {
    public static void main(String[] args) {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment().setParallelism(1);

        SingleOutputStreamOperator<WaterSensor> waterSensorStream = env.socketTextStream(ContentUtils.HOST, 9999).map(new MapFunction<String, WaterSensor>() {
            @Override
            public WaterSensor map(String value) throws Exception {
                String[] datas = value.split(",");
                return new WaterSensor(datas[0], Long.valueOf(datas[1]), Integer.valueOf(datas[2]));
            }
        });
        WatermarkStrategy<WaterSensor> watermarkStrategy = WatermarkStrategy.<WaterSensor>forMonotonousTimestamps().withTimestampAssigner(
                new SerializableTimestampAssigner<WaterSensor>() {
                    @Override
                    public long extractTimestamp(WaterSensor element, long recordTimestamp) {
                        return element.getTs();
                    }
                }
        );

        SingleOutputStreamOperator<WaterSensor> watermarks = waterSensorStream.assignTimestampsAndWatermarks(watermarkStrategy);
        SingleOutputStreamOperator<String> result = watermarks.keyBy(value -> value.getId())
                .process(new KeyedProcessFunction<String, WaterSensor, String>() {
                    @Override
                    public void processElement(WaterSensor value, KeyedProcessFunction<String, WaterSensor, String>.Context ctx, Collector<String> out) throws Exception {
                        long l = value.getTs() + 5 * 1000L;
                        ctx.timerService().registerEventTimeTimer(l);
                        out.collect("注册时间 : " + l);
                    }

                    @Override
                    public void onTimer(long timestamp, KeyedProcessFunction<String, WaterSensor, String>.OnTimerContext ctx, Collector<String> out) throws Exception {

                        out.collect("定时器出发 : " + timestamp);
                    }
                });

        result.print();

        try {
            env.execute();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
